Any idea why the mouse scroll is not working on disabled panel in nintex form.
Can you add a screenshot?
I am finding the same - Forms Version: 188.8.131.52 on SP2013. I have a form with a mixture of enabled and disabled panels. The scroll works when the mouse is over the enabled panel!
We are having the same issue in IE 11 - version 184.108.40.206 on SP2013 - mouse scroll is not working on disabled panels (in Chrome works fine).
I think that you should contact Nintex support so that Nintex can build a fix regarding this bug